Improvement in fan-blowers



UNITED STATES PATENT OEEICE.

RUFUS PORTER, OF MALDEN, MASSACHUSETTS.

IMPROVEMENT IN FAN-BLOWERS.

Specilication forming part of Letters Patent No. 45,749, dated January 3, 1865; antedated June/23, 1864.

To @ZZ whom it may concern:

Be it known that 1, RUEUs PORTER., of Malden, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Blowers; and l hereby declare that the following is a full and exact description of the same, reference beingfhad to the annexed drawings, making part ot' this speciticatiomin which- Figure l is a horizontal section or vertical View of the interior, and Fig. 2 is a vertical View of' the machine with the regulator connected.

The nature of this invention consists in arranging two cams of peculiar form to revolve in contrary directions within a box of a suitable form, and so regulated in their motion by means ot' a combination of pitmen outside that When in motion a portion ot' the peripheries ofthe two cams shall be Constantly contiguonsor nearly in contact, while the two ends or wings ot' each'move in proximity to the curved sides of the box.

Two revolving cams, A and B, of the forni represented in the drawings, Fig. l, are

Vmounted upon central axles within a box, C,

in opposite sides of which are iiumes o and p, the one for the induction and the other for the escape of air. The two cams are placed in positions transverse or at right angles with each other, and the two axle-shafts d h, ex-

tend upward through the top of the box, and are surmounted by two band-wheels, E and F. To the upper side ot' each band-wheel., near the periphery thereof, is attached a p'vo, n, and to each pivot are connected two pinnen, I J K L, extending forward and backward from their respective pivots, and the opposite ends ot' each pair of pitnien are connected to the wings ot' a sliding shaft, M N, which vibrates horizontally in a central groove, g g, or between two guide-plates, r s u fv. These four pitmen, with the sliding shafts and guideplates thus arranged and connectedfconst-itute a regulator, whereby the relative motions and positions of the cams are governed. Driving-belts may be applied to both bandwheels, moving them in opposite directions, or only to one bandwheelthe et't'ect will be the same. By this arrangement the use ot' gear-wheels (which have been proved to be objectionable for this purpose) is dispensed with.

What I claim as my invention, and desire to secure by Letters Patent, is-

The regulator I J K L M N, in combination With the cams AB in box C, all conlbined for the purpose herein specified.

RUFUS PORTER.

Witnesses: v

A. CHANDLER, W. L. WHEELER. 

